Alright, so first we'll have to get y on the other side
So
2x+y=-9
-y -y
+9 +9
2x+9=-y
Then divide is all by -1 so y is positive
-2x-9=y
So the 3x means three times then u multiply by three
Answer:
poop
Step-by-step explanation:
No, it multiplies by -1 each time. Arithmetic sequences add or subtract by a constant number